Logics for Databases and Information Systems
نویسندگان
چکیده
Temporal logic is obtained by adding temporal connectives to a logic language. Explicit references to time are hidden inside the temporal connectives. Different variants of temporal logic use different sets of such connectives. In this chapter, we survey the fundamental varieties of temporal logic and describe their applications in information systems. Several features of temporal logic make it especially attractive as a query and integrity constraint language for temporal databases. First, because the references to time are hidden, queries and integrity constraints are formulated in an abstract, representationindependent way. Second, temporal logic is amenable to efficient implementation. Temporal logic queries can be translated to an algebraic language. Temporal logic constraints can be efficiently enforced using auxiliary stored information. More general languages, with explicit references to time, do not share these properties. Recent research has proposed various implementation techniques to make temporal logic practically useful in database applications. Also, the relationships between different varieties of temporal logic and between temporal logic and other temporal languages have been clarified. We report on these developments and outline some of the remaining open research problems.
منابع مشابه
(Re) Making the Procrustean Bed? Standardization and Customization as Competing Logics in Healthcare
Recent years have witnessed a parallel and seemingly contradictory trend towards both the standardization and the customization of healthcare and medical treatment. Here, we explore what is meant by ‘standardization’ and ‘customization’ in healthcare settings and explore the implications of these changes for healthcare delivery. We frame the paradox of these divergent and opposing factors in te...
متن کاملProviders and Patients Caught Between Standardization and Individualization: Individualized Standardization as a Solution; Comment on “(Re) Making the Procrustean Bed? Standardization and Customization as Competing Logics in Healthcare”
In their 2017 article, Mannion and Exworthy provide a thoughtful and theory-based analysis of two parallel trends in modern healthcare systems and their competing and conflicting logics: standardization and customization. This commentary further discusses the challenge of treatment decision-making in times of evidence-based medicine (EBM), shared decision-making and personalized medicine. From ...
متن کاملPersonalisation - An Emergent Institutional Logic in Healthcare?; Comment on “(Re) Making the Procrustean Bed? Standardization and Customization as Competing Logics in Healthcare”
This commentary on the recent think piece by Mannion and Exworthy reviews their core arguments, highlighting their suggestion that recent forces for personalization have emerged which may counterbalance the strong standardization wave which has been evident in many healthcare settings and systems over the last two decades. These forces for personalization can take very different forms. The comm...
متن کاملProviding an Enterprise Architecture Framework Model for Laboratory Information Management Systems by Service Oriented Approach
Background and Aim: Laboratories are one of the most important scientific and research centers. Laboratory information management systems provide a platform for recording the information and collaborating between researchers. The main purpose of this study was suggesting an organizational architecture model of laboratory information management systems. Materials and Methods: This study was a ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1998